package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //获取openId的接口
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    //获取appid、secret
    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //获取openId
        String openId = getOpenId(userLoginDTO.getCode());

        //根据openId查找数据库中对应的user
        User user = userMapper.getUserByOpenId(openId);

        //判断user是否存在
        //如果不存在就把该user（openId、创建时间）存入数据库中，并赋值给user
        if (user == null){
            user=User.builder()
                    .createTime(LocalDateTime.now())
                    .openid(openId).build();
            userMapper.insert(user);
        }
        //如果存在直接返回
        return user;
    }

    /**
     * 获取openId
     * @param code
     * @return
     */
    public String getOpenId(String code){
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openId = jsonObject.getString("openid");
        return openId;
    }



}
